2. Day 2 Comparing Unit Prices.notebook October 26, 2012
Anticipatory Set
We have all seen the Trident commercials that tell us that
4 out of every 5 dentist recommend Trident to their
patients. What does that mean?
Did they only survey 5 dentists?
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3. Day 2 Comparing Unit Prices.notebook October 26, 2012
Ratio: a comparison of two quantities by division.
Rate: A ratio that compares two quantities measured in
different units.
Example: A person drove 75 miles in 3 hours.
Unit Rate: A rate where the second quantity is one unit.
Example: A person drove at a rate of 25 miles per 1 hour.
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4. Day 2 Comparing Unit Prices.notebook October 26, 2012
Anticipatory Set
In the advertisements from this week, I saw that Best Buy had a
deal where you can get 3 DVD‛s for $19.99. Then I saw that I
could buy 5 DVD‛s for 35.99 at Walmart. How can I determine
which store I should shop at?
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11. Day 2 Comparing Unit Prices.notebook October 26, 2012
4
A
B
Staples Office Depot
Five boxes of pens for $39.95 Seven boxes of pens for $57.75
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12. Day 2 Comparing Unit Prices.notebook October 26, 2012
5
A
B
Radio Shack The Apple Store
Three games for $59.97 Four computer games for $87.96
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13. Day 2 Comparing Unit Prices.notebook October 26, 2012
Before You Leave
Trade a Problem
With your partner, create a problem similar to the examples in
today‛s lesson. You will then trade with another partnership and
answer their question.
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15. Day 2 Comparing Unit Prices.notebook October 26, 2012
OBJECTIVE: How do we compare
unit prices?
Sports Authority Modell‛s
Eight baseballs for $14.00 Six baseballs for $10.14
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